$data.json #1

{
    "$schema": "http://json-schema.org/draft-06/schema#",
    "$id": "https://raw.githubusercontent.com/epoberezkin/ajv/master/lib/refs/$data.json#",
    "description": "Meta-schema for $data reference (JSON-schema extension proposal)",
    "type": "object",
    "required": [ "$data" ],
    "properties": {
        "$data": {
            "type": "string",
            "anyOf": [
                { "format": "relative-json-pointer" }, 
                { "format": "json-pointer" }
            ]
        }
    },
    "additionalProperties": false
}